diff options
Diffstat (limited to 'deps/openssl/openssl/crypto/kdf/hkdf.c')
-rw-r--r-- | deps/openssl/openssl/crypto/kdf/hkdf.c | 83 |
1 files changed, 71 insertions, 12 deletions
diff --git a/deps/openssl/openssl/crypto/kdf/hkdf.c b/deps/openssl/openssl/crypto/kdf/hkdf.c index 0fb55e9c65..ae46fad609 100644 --- a/deps/openssl/openssl/crypto/kdf/hkdf.c +++ b/deps/openssl/openssl/crypto/kdf/hkdf.c @@ -34,6 +34,7 @@ static unsigned char *HKDF_Expand(const EVP_MD *evp_md, unsigned char *okm, size_t okm_len); typedef struct { + int mode; const EVP_MD *md; unsigned char *salt; size_t salt_len; @@ -47,9 +48,10 @@ static int pkey_hkdf_init(EVP_PKEY_CTX *ctx) { HKDF_PKEY_CTX *kctx; - kctx = OPENSSL_zalloc(sizeof(*kctx)); - if (kctx == NULL) + if ((kctx = OPENSSL_zalloc(sizeof(*kctx))) == NULL) { + KDFerr(KDF_F_PKEY_HKDF_INIT, ERR_R_MALLOC_FAILURE); return 0; + } ctx->data = kctx; @@ -77,6 +79,10 @@ static int pkey_hkdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) kctx->md = p2; return 1; + case EVP_PKEY_CTRL_HKDF_MODE: + kctx->mode = p1; + return 1; + case EVP_PKEY_CTRL_HKDF_SALT: if (p1 == 0 || p2 == NULL) return 1; @@ -128,8 +134,24 @@ static int pkey_hkdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) static int pkey_hkdf_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value) { + if (strcmp(type, "mode") == 0) { + int mode; + + if (strcmp(value, "EXTRACT_AND_EXPAND") == 0) + mode = EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND; + else if (strcmp(value, "EXTRACT_ONLY") == 0) + mode = EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY; + else if (strcmp(value, "EXPAND_ONLY") == 0) + mode = EVP_PKEY_HKDEF_MODE_EXPAND_ONLY; + else + return 0; + + return EVP_PKEY_CTX_hkdf_mode(ctx, mode); + } + if (strcmp(type, "md") == 0) - return EVP_PKEY_CTX_set_hkdf_md(ctx, EVP_get_digestbyname(value)); + return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_DERIVE, + EVP_PKEY_CTRL_HKDF_MD, value); if (strcmp(type, "salt") == 0) return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_HKDF_SALT, value); @@ -149,24 +171,57 @@ static int pkey_hkdf_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, if (strcmp(type, "hexinfo") == 0) return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_HKDF_INFO, value); + KDFerr(KDF_F_PKEY_HKDF_CTRL_STR, KDF_R_UNKNOWN_PARAMETER_TYPE); return -2; } +static int pkey_hkdf_derive_init(EVP_PKEY_CTX *ctx) +{ + HKDF_PKEY_CTX *kctx = ctx->data; + + OPENSSL_clear_free(kctx->key, kctx->key_len); + OPENSSL_clear_free(kctx->salt, kctx->salt_len); + OPENSSL_cleanse(kctx->info, kctx->info_len); + memset(kctx, 0, sizeof(*kctx)); + + return 1; +} + static int pkey_hkdf_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen) { HKDF_PKEY_CTX *kctx = ctx->data; - if (kctx->md == NULL || kctx->key == NULL) + if (kctx->md == NULL) { + KDFerr(KDF_F_PKEY_HKDF_DERIVE, KDF_R_MISSING_MESSAGE_DIGEST); return 0; - - if (HKDF(kctx->md, kctx->salt, kctx->salt_len, kctx->key, kctx->key_len, - kctx->info, kctx->info_len, key, *keylen) == NULL) - { + } + if (kctx->key == NULL) { + KDFerr(KDF_F_PKEY_HKDF_DERIVE, KDF_R_MISSING_KEY); return 0; } - return 1; + switch (kctx->mode) { + case EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND: + return HKDF(kctx->md, kctx->salt, kctx->salt_len, kctx->key, + kctx->key_len, kctx->info, kctx->info_len, key, + *keylen) != NULL; + + case EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY: + if (key == NULL) { + *keylen = EVP_MD_size(kctx->md); + return 1; + } + return HKDF_Extract(kctx->md, kctx->salt, kctx->salt_len, kctx->key, + kctx->key_len, key, keylen) != NULL; + + case EVP_PKEY_HKDEF_MODE_EXPAND_ONLY: + return HKDF_Expand(kctx->md, kctx->key, kctx->key_len, kctx->info, + kctx->info_len, key, *keylen) != NULL; + + default: + return 0; + } } const EVP_PKEY_METHOD hkdf_pkey_meth = { @@ -193,7 +248,7 @@ const EVP_PKEY_METHOD hkdf_pkey_meth = { 0, 0, - 0, + pkey_hkdf_derive_init, pkey_hkdf_derive, pkey_hkdf_ctrl, pkey_hkdf_ctrl_str @@ -206,12 +261,16 @@ static unsigned char *HKDF(const EVP_MD *evp_md, unsigned char *okm, size_t okm_len) { unsigned char prk[EVP_MAX_MD_SIZE]; + unsigned char *ret; size_t prk_len; if (!HKDF_Extract(evp_md, salt, salt_len, key, key_len, prk, &prk_len)) return NULL; - return HKDF_Expand(evp_md, prk, prk_len, info, info_len, okm, okm_len); + ret = HKDF_Expand(evp_md, prk, prk_len, info, info_len, okm, okm_len); + OPENSSL_cleanse(prk, sizeof(prk)); + + return ret; } static unsigned char *HKDF_Extract(const EVP_MD *evp_md, @@ -246,7 +305,7 @@ static unsigned char *HKDF_Expand(const EVP_MD *evp_md, if (okm_len % dig_len) n++; - if (n > 255) + if (n > 255 || okm == NULL) return NULL; if ((hmac = HMAC_CTX_new()) == NULL) |